Where does “морально-психологический” come from?

морально-психологический (Russian) comes from Russian психологи́ческий, from Russian психоло́гия, from Latin psychologia, from Latin -logia, from Ancient Greek -λογία, from Ancient Greek λόγος, from Ancient Greek λέγω, from Proto-Indo-European leǵ- — to gather, collect, with derivatives meaning to...

морально-психологический (Russian): moral and psychological

Definitions

moral and psychological

Ancestry of “морально-психологический”, step by step

морально-психологический traces back through two separate lines of ancestry.

via Russian психологи́ческий

Step	Language	Word	Meaning
1	Russian	психологи́ческий	psychological
2	Russian	психоло́гия	psychology
3	Latin	psychologia	—
4	Latin	-logia	-logy; the study of
5	Ancient Greek	-λογία	Base for nouns denoting the study of something,...
6	Ancient Greek	λόγος	That which is said: word, sentence, speech,...
7	Ancient Greek	λέγω	I put in order, arrange, gather; I choose, count,...
8	Proto-Indo-European	leǵ-	to gather, collect, with derivatives meaning to...

via Russian мора́льный

Step	Language	Word	Meaning
1	Russian	мора́льный	moral relating to principles of right and wrong

Every word from Proto-Indo-European leǵ- →Every word from Ancient Greek -λογία →Every word from Ancient Greek λέγω →